Cross sections for L-subshell ionization in Au by the collision of protons and helium ions

S. Datz, J. L. Duggan, L. C. Feldman, E. Laegsgaard, J. U. Andersen

Research output: Contribution to journalArticlepeer-review

119 Citations (Scopus)

Abstract

Absolute ionization cross sections for the L subshells of Au by proton bombardment (0.25-5.2 MeV) have been determined from data obtained using a Si(Li) detector and the presently available values for radiative transition probabilities, fluorescence yields, and Coster-Kronig factors. The measured cross sections are compared with values calculated by Choi using the plane-wave Born approximation (PWBA) with either relativistic or nonrelativistic hydrogenic wave functions for the Au electrons. Except at low energies (ηLθL2<0.2) where the uncorrected PWBA is questionable, the agreement is good. A plateau in the 2s ionization cross section attributable to the bimodal 2s-electron wave function is observed in the region 0.5-1.0 MeV. Ionization by He ions (1-12 MeV) is similar, but significant differences in subshell behavior are observed.

Original languageEnglish
Pages (from-to)192-196
Number of pages5
JournalPhysical Review A
Volume9
Issue number1
DOIs
Publication statusPublished - 1974

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Fingerprint Dive into the research topics of 'Cross sections for L-subshell ionization in Au by the collision of protons and helium ions'. Together they form a unique fingerprint.

Cite this